71804 CD/P4DBB
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71804 CD/P4DBB Bearing Product Overview & Core Advantages
The 71804 CD/P4DBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement is preloaded to Light / Class B specifications, ensuring optimal performance under combined radial and axial loads. Manufactured to P4 tolerance class, it delivers superior running accuracy, making it ideal for high-speed spindles and other precision machinery where minimal runout and high system rigidity are critical.
71804 CD/P4DBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71804 | Basic bearing designation (20mm bore, 32mm OD, 14mm width) |
| C | 15° contact angle |
| D | Duplex bearing set |
| P4 | High precision tolerance class |
| DB | Back-to-Back mounting arrangement |
71804 CD/P4DBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back configuration creates a rigid bearing system capable of withstanding combined loads (radial and axial loads acting simultaneously) and moment loads. The light preload eliminates internal clearance, enhancing shaft positioning accuracy and system stiffness.
Precision Performance: Manufactured to ABEC 7/P4 tolerance class with a 15° contact angle, this bearing ensures minimal vibration and precise rotational characteristics. The phenolic resin cage provides excellent dimensional stability and is suitable for high-speed operation.
High-Speed Capability: With a limiting speed of 100,500 rpm and a lightweight phenolic cage, this bearing is engineered for high-speed applications. The open design allows for efficient lubrication management in demanding spindle environments.
Material Quality: Constructed from chrome steel for both rings and balls, the bearing offers high hardness, wear resistance, and long service life under demanding operating conditions.
71804 CD/P4DBB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision lathes
- Precision Instruments: Measuring equipment, optical scanners, and coordinate measuring machines
- High-Frequency Motors: Spindles for PCB drilling and high-speed electric motors
- Medical Equipment: Dental handpieces and laboratory instrumentation
- Aerospace Systems: Gyroscopes and other precision navigation components
